Wrench.



j /w WI Mme/Wm PATENTED MAR. 8, 1904, J. R. HARRISON,

WRENCH.

APPLICATION FILED MAR. 13, 1903.

H0 MODEL.

UNITED STATES Batented March 8, 1904.

PATENT OFFICE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 754,137, dated March 8, 1904.

Application filed March 13,1903- To all whom it may concern.-

Be it known that I, JULIAN R. HARRISON, a citizen of the United States, residing at Barnwell, county of Barnwell, and State of South Carolina, have invented a certain new and useful Improvement in Wrenches, of which the following is a specification.

My invention relates to a new and useful improvement in wrenches, and has for its object to provide a wrench similar to the ordinary monkey-wrench, but so constructed that the movable jaw can be moved very quickly to any position, thus doing away with the old method of moving the jaws slowly by means of a screw.

With this end in view this invention consists in the details of construction and combination of elements hereinafter set forth, and then specifically'designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, the construction and operation will now be described in detail, referring to the accompanyingdrawings, forming a part of this specification, in which Figure 1 is a side elevation of my improved wrench; Fig. 2, a longitudinal section through the same; Fig. 3, a section taken on the line 3 3 of Fig. 1.

A represents the shank of the wrench, which has formed upon one end the head or stationary jaw B, and upon the other end of the shank is secured the handle C in any suitable manner.

D is the movable jaw, the rear end of which surrounds the shank A and adapted to slide thereon.

E is a housing formed in one piece with the jaw- D and connected thereto by the connection F. The rear end of the housing E also surrounds the shank A and slides thereon, the whole movable portion being placed upon the shank before the handle C is secured in place. Upon the forward face of the shank A are formed ratchet-teeth G, and are so formed that the flat side or shoulder of the teeth are upon the side toward the outer end of the Wing. The housing E is bored from the outer end entirely through at right angles to the shank, as indicated at H, and in this opening Serial No. 147,589. (No model.)

H is inserted a block I, adapted to slide with in the opening. Upon the inner end of the block I is formed a tooth I, adapted to engage the ratchet-teeth. The outer end of the opening H is interiorly threaded, and after the block I is inserted in the opening H a spring J is inserted and the block K is threaded in the outer end of the opening H against the spring, which spring is then interposed between the block I and the plug K, thus tending to always force the block I toward the shank A. Thus it will be seen that on account of the formation of the teeth G the movable jaw D can be forced toward the stationary jaw B and the tooth I will be forced backward as it slides over the teeth; but the jaw D cannot be moved away from the jawB without removing the tooth I from its engagement with the ratchet-teeth G. For the purpose of moving the block I backward against the tension of the spring I form through each end of the housing E a slot L, and through the block I is driven a pin N, which also passes through the slots L and protrudes upon each side of the housing, the housing being concaved upon each side, as indicated at N, to allow room for the fingers to engage the pin M, and thus the pin M does not need to protrude over far upon each side of the housing.

In operation it will be seen that it is only necessary in order to bring the jaws in con-- tact with the article to be turned to push the movable jaw in close contact with the article, which can be done in a very short space of time, and to remove the movable jaw it is only necessary to place the fingers upon each side of the housing, pull backward upon the pin M, and then move the jaw D to any point desired. Of course when very accurate adjustment on the wrench is desired the teeth Gr can be made much finer than that shown in the drawings.

A pin 0 may be inserted through'the shank A near the handle C and protrude upon each side a short distance to limit the movement of the movable jaw.

The advantage of my invention is that by this construction I am enabled to provide a wrench which can be adjusted instantly and will be as powerful as an ordinary monkeywrench and will consist of such few parts as to be very durable, and if any of the parts should become broken or damaged they may be quickly repaired or replaced.

Of oourseI do not wish to be limited to the exact construction here shown, as slight modifications could be made without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new and useful is- As a new article of manufacture, a wrench consisting of a shank, a stationary jaw formed upon one end of the shank, a handle secured to the opposite end of the shank, ratchetteeth formed upon the forward face of the shank, a movable jaw slidably mounted upon the shank, a housing carried by the movable jaw, a circular opening formed through the housing at right angles to the shank, a block fitted within said opening and adapted to slide thereon, a tooth carried by the block and adapted to engage the ratchet-teeth, a plug threaded in the outer end of the opening in the housing, a spring interposed between the plug and the sliding block, the housing provided with concavities upon each side and also with slots formed within the concavities and extending through to the opening formed through the housing, a pin carried by the sliding block and extending through the slots and protruding each side in the concavities, and a pin pro jecting from each side of the shank at a point near the handle for limiting the movement of the movable jaw, as specified.

In testimony whereof I have hereunto affixed my signature in the presence of two subscribing witnesses.

JULIAN R. HARRISON.

Witnesses:

FRANK H. (JI-IEEoH, J. C. SMITH. 

